Curso "Introdução ao estudo do comportamento do zebrafish"
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Transcript of Curso "Introdução ao estudo do comportamento do zebrafish"
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The zebrafish (Danio rerio): General aspects
Popular name in Brazil: “paulistinha”
Cyprinidae
Small size (around 2 to 4 cm)
Native from Southeast Asia
Live in shoals
Eggs develop externally
Transparent embryos
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História natural
♂
♀
http://dx.doi.org/10.7554/eLife.05635.002
Natural history
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História natural
http://dx.doi.org/10.7554/eLife.05635.003
Competidores
Predadores
Na Natural history
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História naturalHistória naturalNa Natural history
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Developmental biology of zebrafish
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The anatomy of zebrafish
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Camouflage response
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Zebrafish and humans have a consistent neurochemical conservation
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Most of their food come from the water column, mainly eating zooplankton and aquatic insects Animal Foods: eggs; insects; terrestrial non-insect arthropods;
zooplankton Plant Foods: algae; phytoplankton Foraging Behavior: filter-feeding Primary Diet: omnivore ; planktivore
Olfaction, vision, and motion detection via the lateral line
system help zebrafish perceive their local environment and evade potential predators
Movement in the surrounding water is detected by the
lateral line, which can detect small changes in pressure in the immediate environment.
Zebrafish respond to a broad range of chemical cues
detected by the olfactory bulb. Olfaction is particularly important for reproduction in zebrafish. Female zebrafish must come in contact with male gonadal pheromones in order to ovulate. Meanwhile, male zebrafish must come in contact with female pheromones in order to initiate spawning behavior
Basic behavioral traits
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Zebrafish larvae has different strategies to avoid predation
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Zebrafish usually form shoals with conspecifics
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Is there any biological advantage?